Boa Vista Mine (topaz), Ouro Preto

ROCKHOUNDING PROHIBITED / VIEW ONLY DOCUMENTED

Where: Minas Gerais · South America · approx. -20.4, -43.5 (vicinity only)

Why this spot: Hydrothermal / weathered

What turns up: Imperial topaz, euclase

Access: Prohibited / view only.

Working topaz mine; specimens bought

Satellite view, historic-map overlays, tide/flow context and field notes are in the app. Exact research detail is part of Pro.

Pins are approximate by design. This page is historical research, not permission to dig. Check ownership and local law first.